feat: lens effects tab, standalone motion effects, clip/asset rename, preview popout

- New Lens category in the assets panel: Blur, Motion Blur, Zoom In/Out,
  Pan x4, Shake, Pulse, Spin, Custom Zoom. EffectDefinition gains a
  category field; tabs with an empty category are hidden, and the
  properties-panel 'Open effects' button opens the first non-empty one.
- Motion effects work standalone: dropping them on the timeline creates
  an effect-track element that animates (scale/translate/rotate) every
  track below it, computed purely in the TS frame descriptor - no wasm
  changes, identical in preview and export. supportsStandalone removed.
- Motion Blur: directional gaussian smear (amount + angle) reusing the
  existing WGSL shader with arbitrary u_direction.
- Custom Zoom: start/end scale params (keyframable clip-level).
- MotionOffset gains optional rotate, accumulated clip-level and applied
  to standalone layer quads via rotationDegrees.
- Rename clips (timeline context menu) and media assets (media panel
  context menu) via a shared RenameDialog; asset rename persists through
  storageService with rollback on error.
- Preview pops out into a Document Picture-in-Picture window and docks
  back; button hidden where the API is unsupported.
- Export keeps running when the export popover is closed; only the
  explicit Cancel button aborts.
- Captions and Adjustment tabs removed from the assets panel.

1 files changed, 37 insertions, 6 deletions

diff --git a/apps/web/src/app/editor/page.tsx b/apps/web/src/app/editor/page.tsx
index 8229774a..5719be94 100644
--- a/apps/web/src/app/editor/page.tsx
+++ b/apps/web/src/app/editor/page.tsx
@@ -17,7 +17,8 @@ import { MigrationDialog } from "@/project/components/migration-dialog";
 import { usePanelStore } from "@/editor/panel-store";
 import { usePasteMedia } from "@/media/use-paste-media";
 import { MobileGate } from "@/components/editor/mobile-gate";
-import { Suspense, useMemo, useState } from "react";
+import { Suspense, useEffect, useMemo, useState } from "react";
+import { createPortal } from "react-dom";
 import { useEditor } from "@/editor/use-editor";
 import { Cancel01Icon } from "@hugeicons/core-free-icons";
 import { HugeiconsIcon } from "@hugeicons/react";
@@ -29,6 +30,7 @@ import {
 	mergePreviewOverlaySources,
 } from "@/preview/overlays";
 import { usePreviewStore } from "@/preview/preview-store";
+import { usePreviewPopoutStore } from "@/preview/popout-store";
 import { getGuidePreviewOverlaySource } from "@/guides";
 import {
 	bookmarkNotesPreviewOverlay,
@@ -98,6 +100,14 @@ function EditorLayout() {
 	const setOverlayVisibility = usePreviewStore(
 		(state) => state.setOverlayVisibility,
 	);
+	const popoutContainer = usePreviewPopoutStore((state) => state.container);
+	const dockPopout = usePreviewPopoutStore((state) => state.dockPopout);
+
+	useEffect(() => {
+		return () => {
+			usePreviewPopoutStore.getState().dockPopout();
+		};
+	}, []);
 	const showBookmarkNotes = isPreviewOverlayVisible({
 		overlay: bookmarkNotesPreviewOverlay,
 		overlays,
@@ -182,11 +192,32 @@ function EditorLayout() {
 						minSize={30}
 						className="min-h-0 min-w-0 flex-1"
 					>
-						<PreviewPanel
-							overlayControls={overlayControls}
-							overlayInstances={overlaySource.instances}
-							onOverlayVisibilityChange={setOverlayVisibility}
-						/>
+						{popoutContainer ? (
+							<>
+								{createPortal(
+									<PreviewPanel
+										overlayControls={overlayControls}
+										overlayInstances={overlaySource.instances}
+										onOverlayVisibilityChange={setOverlayVisibility}
+									/>,
+									popoutContainer,
+								)}
+								<div className="flex size-full flex-col items-center justify-center gap-3">
+									<span className="text-muted-foreground text-sm">
+										Preview is popped out
+									</span>
+									<Button variant="secondary" onClick={dockPopout}>
+										Dock preview
+									</Button>
+								</div>
+							</>
+						) : (
+							<PreviewPanel
+								overlayControls={overlayControls}
+								overlayInstances={overlaySource.instances}
+								onOverlayVisibilityChange={setOverlayVisibility}
+							/>
+						)}
 					</ResizablePanel>
 
 					<ResizableHandle withHandle />